/Engine/Plugins/Compositing/Composure/Source/ComposureLayersEditor/Public/ICompElementManager.h
Attaches the specified element as a child to the named parent.
True if the element was successfully added as a child to the specified parent.
bool AttachCompElement ( const [FName](API\Runtime\Core\UObject\FName) ParentName, const [FName](API\Runtime\Core\UObject\FName) ElementName )